Am I bi ual?

Ok, so I've had this friend for years and right around December I started having this urge to kiss her. When my guy friend dared me to do just that a few weeks later of course I had no objections. It ended up being better and more meaningful then any of the times a kissed a guy. As of now I truthfully feel like I would choose going out with her over any guy. I still love doing stuff with guys though and that is why I'm just so confused. Also I've checked out girls before this but it never really ment anything till now.